# Calculate number of days between two dates logstash \[solved\]
**URL:** https://discuss.elastic.co/t/calculate-number-of-days-between-two-dates-logstash-solved/96772
**Category:** Logstash
**Created:** [August 11, 2017, 12:21pm UTC](https://discuss.elastic.co/t/calculate-number-of-days-between-two-dates-logstash-solved/96772 "2017-08-11T12:21:27Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Chemse](https://discuss.elastic.co/u/Chemse)
#### Post date: [August 11, 2017, 12:21pm UTC](https://discuss.elastic.co/t/calculate-number-of-days-between-two-dates-logstash-solved/96772/1 "2017-08-11T12:21:27Z")
Hello,
I want to calculate number of days between two dates in logstash
I have :
```
date {
match => ["Deb","dd/MM/YYYY"]
target=> "Deb"
}
date {
match => ["toDay","dd/MM/YYYY"]
target=> "toDay"
}
```
and I did this Ruby filter but it doesn't work !!
```
ruby {
init => "require 'time'"
code => "event['duree'] = event['toDay'] - event['Deb'];"
}
```
Can you help me please 🙂
---
### Author:  [@Chemse](https://discuss.elastic.co/u/Chemse)
#### Post date: [August 11, 2017, 1:07pm UTC](https://discuss.elastic.co/t/calculate-number-of-days-between-two-dates-logstash-solved/96772/2 "2017-08-11T13:07:22Z")
Solved by doing this
```
ruby {
code => "event.set('duree', (event.get('toDay') - event.get('Deb'))/3600/24)"
}
```
first I got the period on secondes so I convert it to days
good luck 🙂
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 8, 2017, 1:07pm UTC](https://discuss.elastic.co/t/calculate-number-of-days-between-two-dates-logstash-solved/96772/3 "2017-09-08T13:07:51Z")
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